Ed, the other day you said: The no-3-in-line, in 2-space, is a well known problem (by Dudeney, 1917). http://www.research.att.com/~njas/sequences/A000769 I did find "No-three-in-line-in-3D" by<A0> Attila Por, David R. Wood http://citeseer.ist.psu.edu/por04nothreelined.html Me: I can't access the latter references (w/o spending money, that is). Do you know if the first few terms of that sequence have been computed? (Same question of course for your new version) Best regards Neil